Patent GB-190307463-A (GB)
Title: Improvements in Door Closers and Checks.
Inventor: BARDSLEY JOSEPH
Filed: 1903-03-31
Granted: 1903-05-14
Abstract: 7463. Bardsley, J. March 31. Door-closing apparatus; door checks.-A check is combined in one casing with a spring, the casing being sealed to prevent escape of liquid. The spring is arranged to act both ways, so that the apparatus is applicable to right-hand or left-hand doors. The apparatus is mounted on the door, and the lever 50, Fig. 1, is connected by an adjustable link with the bracket 91 on the lintel. The upper part 92 of the link is a threaded rod, and the lower or socket part 93 is divided at the end and is threaded internally and externally. When the nut 95 is removed, the ends spring apart, so that they can be moved up or down on the screwed rod 92. The lever 50 is fixed on the spindle 26, which passes down through the spring 69 into the check cylinder 21, within which it carries a crank 40. The crank is connected by the link 39 with the pin 38 crossing the piston 33. The pin 38 crosses the valve chamber 34, and limits the movement of the ball 37. Liquid escapes from behind the piston during the closing movement by the passage 44, Fig. 5, controlled by the screw 47. As the piston nears the end of the cylinder, the air pressure is relieved by the port 46 registering with the hole 45 in the side of the passage 44. A groove 48 leads from the port 46, so that air can still escape freely when the port 46 passes beyond the hole 45. The end of the cylinder 21 is closed by the cover 27, which is secured by the screw 29 engaging the spider 30. The plate 24 between the cylinder 21 and the casing 22 containing the spring &c. is perforated, so that the liquid is free to enter the casing 22. The aperture in the cover 53 is closed by the piece 52, shown separately in Fig. 6. The annular chambers 57, 58 are filled with suitable packing through the hole 59. The packing material may be semi-plastic and may become firm within the chambers, to seal the casing without producing friction on the spindle 26. The piece 52 is loose on the spindle and is moved by the pawl 51, Fig. 1, which can be set to act in either direction. The piece 52 has projections 60, Fig. 6, by means of which it engages the intermediate piece 66, also mounted freely on the spindle and located within the spring 69. The piece 66 has projections 76, 77 at the bottom to engage against studs 74, 75 on the bottom plate 67, shown separately in Fig. 9, and projections 84, 85 at the top to engage similar studs on the top plate 78. The studs are so arranged, that when the piece 66 is turned in one direction, the top plate 78 is moved, and when it is turned in the other direction, the bottom plate 67 is moved. The motion of the plates in the opposite directions is prevented by projections 72, 87, which bear against oppcsite sides of a rib on the casing. The ends of the spring 69 engage shoulders 71, 86 on the plates. When the piece 66 is turned in one direction or the other, the spring is therefore wound up, either from the top or from the bottom. The projections 70, 81 on the plates are of graduated heights to bear on the last coil of the spring at the top or bottom. When the parts are assembled, tension is put on the spring by means of a tool engaging notches 88 in the top plate. While the spring is being wound, the projection 87 passes over the top of the fixed rib ; when sufficient tension has been attained, the spring is pressed home, and the projection is engaged behind the rib.